
/* Copyright 1998 by the Massachusetts Institute of Technology.
 *
 * Permission to use, copy, modify, and distribute this
 * software and its documentation for any purpose and without
 * fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright
 * notice and this permission notice appear in supporting
 * documentation, and that the name of M.I.T. not be used in
 * advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 * M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 */

#include "ares_setup.h"

#include "ares.h"
#include "ares_private.h"

void ares__close_sockets(ares_channel channel, struct server_state* server)
{
    struct send_request* sendreq;

    /* Free all pending output buffers. */
    while (server->qhead) {
        /* Advance server->qhead; pull out query as we go. */
        sendreq = server->qhead;
        server->qhead = sendreq->next;
        if (sendreq->data_storage != NULL)
            ares_free(sendreq->data_storage);
        ares_free(sendreq);
    }
    server->qtail = NULL;

    /* Reset any existing input buffer. */
    if (server->tcp_buffer)
        ares_free(server->tcp_buffer);
    server->tcp_buffer = NULL;
    server->tcp_lenbuf_pos = 0;

    /* Reset brokenness */
    server->is_broken = 0;

    /* Close the TCP and UDP sockets. */
    if (server->tcp_socket != ARES_SOCKET_BAD) {
        SOCK_STATE_CALLBACK(channel, server->tcp_socket, 0, 0);
        sclose(server->tcp_socket);
        server->tcp_socket = ARES_SOCKET_BAD;
        server->tcp_connection_generation = ++channel->tcp_connection_generation;
    }
    if (server->udp_socket != ARES_SOCKET_BAD) {
        SOCK_STATE_CALLBACK(channel, server->udp_socket, 0, 0);
        sclose(server->udp_socket);
        server->udp_socket = ARES_SOCKET_BAD;
    }
}
